Assessment of genetic variability in diverse genotypes of Gossypium arboreum L . for yield and related traits under north western plains

The present study was conducted on seventeen diverse genotypes of cotton belonging to different parts of India to analyze the parameters of genetic variability for seed cotton yield and its components at Cotton Research Area, Punjab Agricultural University, Ludhiana and Regional Station, Faridkot, Punjab. Analysis of variance revealed significant differences for all the traits at both locations indicating sufficient variability present in the material. The phenotypic coefficient of variation (PCV) ranged from 7.95 to 34.66 at Faridkot whereas at Ludhiana it varied from 6.47 to 26.45 for ginning out turn and lint yield, respectively. Heritability ranged from 24.18 to 94.91 at Faridkot and 45.71 to 91.38 at Ludhiana, for boll weight and lint yield respectively. High genetic advance (GA) was observed in only two traits seed cotton yield (31.41 & 26.87) and plant height (28.12 & 19.19). High heritability coupled with high genetic advance as percentage of mean (GAM) was recorded for seed cotton yield (59.86 & 41.39), boll number (25.62 & 33.93), lint yield (57.71 & 49.79) and number of sympods (51.75 & 41.15) at Faridkot and Ludhiana respectively. Hence simple selection based on phenotypic performance of these characters would be more effective.

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